09-05-2010
What do you mean? Empty line before added one?
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2. Shell Programming and Scripting
I want to add a line at the beginning and at the end of a file..
e.g.
echo "at the beginning.." > tmp_file &&
cat file >> tmp_file &&
echo "last line" >> tmp_file &&
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is there a nice way for doing that??
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Hi guys,
How to add a line before a specific line (identified with the starting work ex: xxx) of a file and write it back to the same file?
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Hi,
I am a relative new bee in scripting. I need to develop a script such that the code would iterate through each file in a source directory and append every line of the file with '|' and the corresponding file filename.
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Hi,
I have one file a.txt ,the contents of the file is
A B C
D E F
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1 2 3
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Hi,
I am new to Sed /awk commands. using that i want to add new empty line after every line in a file by leaving first three lines. So, can any one help me out how to achieve this.
Example:
---------
Input Filename: file1.txt
Input Data:
--------Report--------
Date:20-10-03... (4 Replies)
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I have a tab delimited text file,
id name distance
1 3325167 0.334561754018
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3 3288794 0.392312701782
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5 3295355 0.394394169485
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8. Shell Programming and Scripting
Hello Everyone,
I need a help from experts of this community regarding one of the issue that I am facing with shell scripting.
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Hi everyone,
currently I writing a script for comparing 2 variable in 2 line then output the line with equal value to new file. However, the new file only contain last line only, the earlier line was delete. I do google my problem but still not find the way out. Sorry for my English.
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I have a shell script that looks something like the following:
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mysql -uroot db2 < db2.sql
mysql -uroot db3 < db3.sql
mysql -uroot db4 < db4.sql
....
different db names in more than 160 lines.
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LEARN ABOUT MOJAVE
lassign
lassign(n) Tcl Built-In Commands lassign(n)
__________________________________________________________________________________________________________________________________________________
NAME
lassign - Assign list elements to variables
SYNOPSIS
lassign list varName ?varName ...?
_________________________________________________________________
DESCRIPTION
This command treats the value list as a list and assigns successive elements from that list to the variables given by the varName arguments
in order. If there are more variable names than list elements, the remaining variables are set to the empty string. If there are more
list elements than variables, a list of unassigned elements is returned.
EXAMPLES
An illustration of how multiple assignment works, and what happens when there are either too few or too many elements.
lassign {a b c} x y z ;# Empty return
puts $x ;# Prints "a"
puts $y ;# Prints "b"
puts $z ;# Prints "c"
lassign {d e} x y z ;# Empty return
puts $x ;# Prints "d"
puts $y ;# Prints "e"
puts $z ;# Prints ""
lassign {f g h i} x y ;# Returns "h i"
puts $x ;# Prints "f"
puts $y ;# Prints "g"
The lassign command has other uses. It can be used to create the analogue of the "shift" command in many shell languages like this:
set ::argv [lassign $::argv argumentToReadOff]
SEE ALSO
lindex(n), list(n), lset(n), set(n)
KEYWORDS
assign, element, list, multiple, set, variable
Tcl 8.5 lassign(n)